The Funeral Prayer (Salat Al-Janazah)
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 26
وَقَالَ أَبُو جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ: «مَنْ مَشَى مَعَ جَنَازَةٍ حَتَّى يُصَلَّى عَلَيْهَا ثُمَّ رَجَعَ كَانَ لَهُ قِيرَاطٌ وَ إِذَا مَشَى مَعَهَا حَتَّى تُدْفَنَ كَانَ لَهُ قِيرَاطَانِ وَ اَلْقِيرَاطُ مِثْلُ جَبَلِ أُحُدٍ.
Imam Muhammad ibn Ali Al-Baqir عليه السلام said: "Whoever walks with a funeral procession until the funeral prayer is offered and then returns will receive one qirat (measure of reward). If they continue walking with it until the deceased is buried, they will receive two qirats, and one qirat is like the size of Mount Uhud."
- Ṣaḥīḥ al-Faqīh